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 <h1 class="title">Data Filtering</h1>
 

 

 







 





 





 







 








<ul class="chunklist chunklist_book"><li><a href="intro.filter.html">简介</a></li><li><a href="filter.setup.html">安装／配置</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="filter.requirements.html">需求</a></li><li><a href="filter.installation.html">安装</a></li><li><a href="filter.configuration.html">运行时配置</a></li><li><a href="filter.resources.html">资源类型</a></li></ul></li><li><a href="filter.filters.html">Types of filters</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="filter.filters.validate.html">Validate filters</a></li><li><a href="filter.filters.sanitize.html">Sanitize filters</a></li><li><a href="filter.filters.misc.html">Other filters</a></li><li><a href="filter.filters.flags.html">Filter flags</a></li></ul></li><li><a href="filter.constants.html">预定义常量</a></li><li><a href="filter.examples.html">范例</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="filter.examples.validation.html">Validation</a></li><li><a href="filter.examples.sanitization.html">Sanitization</a></li></ul></li><li><a href="ref.filter.html">Filter 函数</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="function.filter-has-var.html">filter_has_var</a> — Checks if variable of specified type exists</li><li><a href="function.filter-id.html">filter_id</a> — Returns the filter ID belonging to a named filter</li><li><a href="function.filter-input-array.html">filter_input_array</a> — Gets external variables and optionally filters them</li><li><a href="function.filter-input.html">filter_input</a> — Gets a specific external variable by name and optionally filters it</li><li><a href="function.filter-list.html">filter_list</a> — Returns a list of all supported filters</li><li><a href="function.filter-var-array.html">filter_var_array</a> — Gets multiple variables and optionally filters them</li><li><a href="function.filter-var.html">filter_var</a> — Filters a variable with a specified filter</li></ul></li></ul></div><hr /><div class="manualnavbar" style="text-align: center;">
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